316L Stainless Steel

316L stainless steel is second wide used Austenitic stainless steel, particularly used in chloride corrosion environment because of its excellent corrosion resistance property.

316L stainless is the low carbon version of 316, and derivative steel 18-8 type stainless steel, adding 2 ~ 3% of Mo element, it is molybdenum-bearing grade。

澳门凯发娱乐On the basis of 316L, develop other stainless steels by adding different chemical elements, such as, adding a small amount of Ti derived after 316 Ti, adding a small amount of N derived from 316N, increasing the content of Ni and Mo derived 317.

316L Stainless Steel Chemical Composition, And 316, 1.4401, 1.4404, 1.4435

CMnPSSiNiCrMoTiN
3160.082.000.0450.0301.011-1416-182-3
316L0.0352.000.0450.0301.010-1416-182-3
1.44010.072.000.0400.0151.010-1316.5-18.52-2.50.11
1.44040.032.000.0400.0151.010-1316.5-18.52-2.50.11
1.44350.032.000.0400.0151.012.5-1517-192.5-30.11

Note: SUS316L is JIS standard grade, Ni content 12% – 15%.

316L Stainless Steel Mechanical Properties, And 316, 1.4401, 1.4404, 1.4435

Tensile Strength(Mpa)Yield Point(Mpa)Elongation(%)Hardness (HRB)
3165152053595
316L4851703595
1.4401510-7102054095
1.4404490-6901904095
1.4435490-6901904095

316L Stainless Steel Equivalent Grades

AISIUNSDINENJISGB
316LS316031.4404X2CrNiMo17-12-2SUS316L<022Cr17Ni12Mo2

316L Stainless Steel Physical Properties

Density Melting Point Specific heat Thermal conductivity [W/(m·K)] Coefficient of Expansion( 10-6/K ) Electrical Resistivity Elastic modulus Magnetic
g/cm3 (℃) [J/(kg·K)] 0~100 ℃ 100 ℃ 500 ℃ 0~100 ℃ 0~500 ℃ ( NΩ.m kN/mm2
7.99 1398~1427 500 16.3 21.5 16.6 18.6 740 193 a little after cold worked

Corrosion Resistance

  • Better choice than 304 in range of atmospheric environments and many corrosive media due to the increased chromium and molybdenum content.
  • Resist pitting and crevice corrosion in warm chloride environments, and to stress corrosion cracking above about 122°F (50°C).
  • Considered resistant to potable water with up to about 1000mg/L chlorides at ambient temperatures, reducing to about 500mg/L at 140°F (60°C).
  • Usually regarded as the marine grade stainless steel, but is not resistant to warm sea water.

Heat Resistance

Good oxidation resistance in intermittent service to 870 °C and in continuous service to 925 °C, Grade 316L stainless steel is more resistant to carbide precipitation.

Welding Characteristic

澳门凯发娱乐Excellent weldability by all standard fusion methods, both with and without filler metals, Heavy welded sections in Grade 316 require post-weld annealing for maximum corrosion resistance, this is not required for grade 316L.

Heat Treatment And Hardening

316L annealing temperature range is 1900 to 2100°F (1038 to 1149°C), cannot be hardened by heat treatment, It can be hardened by cold working。

Differences Between 316 And 316L

316L is very similar to 316 in almost every aspect。 there both are durable, corrosion-resistant, and a good choice for high-stress applications, in practice, dual certified grade 316/316L is often required。

However, the “L” designation means 316L steel has less carbon than 316 steel, it is less susceptible to sensitization, a condition caused when carbon combines with chromium around the grain boundaries, depleting the grain boundary areas of chromium during welding process, though it can be resisted via annealing.

316L stainless steel also is great choice for high-temperature, high-corrosion applications, particularly for marine projects。